Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

5
   2   
       
7      
   2   
       
7      
8
3
4
6
1
9
6
4
9
1
7
2
5
3
8
8
3
1
9
6
5
7
2
4
1
5
3
4
6
6
9
8
2
7
2
6
8
1
5
3
1  2  3
4  5  6
7  8  9
4
4
9
8
2
7
3
1
5
6
3
9
8
2
4
1
7
6
5
4
5
7
9
6
3
2
8
1
6
1
2
5
8
7
3
4
9

 

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